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3 years ago

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A bag contains 120 marbles. The theoretical probability of randomly drawing a purple marble is 4/5 find the number of purple m

arbles in the bag HELPPPP!!

1 answer:

andrew11 [14]3 years ago

7 0

Answer:

4/5 is the same as 8/10, or 80%

so, multiply the 120x .8= 100

100 purple marbles

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ivolga24 [154]

Answer:

I believe the answer is 45

Step-by-step explanation:

First do the parentheses: 12-2=10

Then do the exponent: 3^2=3*3=9

Next multiply 9 by 10: 9*10=90

Lastly divide 90 by 2: 90/2=45

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3 years ago

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Is negative 2 n 13/16 greater, or less than or equal to negative 2 11/14???

Kazeer [188]

$-2 \frac{13}{16} \ \textless \ -2\frac{11}{14}$

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3 years ago

What is the average rate of change of the amount of the element over the 10-minute experiment? *

Dima020 [189]

Answer:

$-2.7 g/min$

Step-by-step explanation:

Given: a graph

To find: the average rate of change of the amount of the element over the 10-minute experiment

Solution:

A rate of change of one quantity with respect to another quantity is known as rate of change. If y is the dependent variable and x is the independent variable then average rate of change = change in y /change in x.

From the graph,

change in x (time) = $10-0=10$ minutes

change in y ( amount of the element) = $3.22-30=-26.78$ g

So, average rate of change = $\frac{-26.78}{10} =-2.7 g/min$

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3 years ago

5x+8y=24? A)y=-5/8x+3 B)y=-3/8x-5/8 C)y=3x-5/8 D)y=3/8x-5/8

klasskru [66]

5x+8y = 24
The answer is c) y=3 -5/8 x

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3 years ago

21 marbles out of N are blue; probability of getting a blue one = 30%

MissTica

$Probability=\frac{desired}{total}$
$0.3=\frac{21}{N}$
$0.3N=21$
$N=\frac{21}{0.3}$
$N=70$

There are 70 total marbles.

4 0

3 years ago